213121434302553 has 8 divisors (see below), whose sum is σ = 324756471318208. Its totient is φ = 121783676744304.

The previous prime is 213121434302551. The next prime is 213121434302561. The reversal of 213121434302553 is 355203434121312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213121434302553 - 2¹ = 213121434302551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213121434302551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5074319864326 + ... + 5074319864367.

It is an arithmetic number, because the mean of its divisors is an integer number (40594558914776).

Almost surely, 2^{213121434302553} is an apocalyptic number.

It is an amenable number.

213121434302553 is a deficient number, since it is larger than the sum of its proper divisors (111635037015655).

213121434302553 is a wasteful number, since it uses less digits than its factorization.

213121434302553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10148639728703.

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 213121434302553 its reverse (355203434121312), we get a palindrome (568324868423865).

The spelling of 213121434302553 in words is "two hundred thirteen trillion, one hundred twenty-one billion, four hundred thirty-four million, three hundred two thousand, five hundred fifty-three".